Window lock



FIG. 1 is a front, and a side perspective view of a window lock showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is an end elevation view from the left of FIG. 4 thereof. 

The ornamental design for a window lock, as shown and described. 